Datasheet

MSP430FE42x2
MIXED SIGNAL MICROCONTROLLER
SLAS616 − JULY 2008
22
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POR brownout, reset (see Notes 1 and 2)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t
d(BOR)
2000 µs
V
CC(start)
dV
CC
/dt ≤ 3 V/s (see Figure 6)
0.7 ×
V
(B_IT−)
V
V
(B_IT−)
Brownout
dV
CC
/dt ≤ 3 V/s (see Figure 6, Figure 7, Figure 8) 1.71 V
V
hys(B_IT−)
dV
CC
/dt ≤ 3 V/s (see Figure 6) 70 130 180 mV
t
(reset)
Pulse length needed at RST/NMI pin to accepted reset internally,
V
CC
= 3 V
2 µs
NOTES: 1. The current consumption of the brownout module is already included in the I
CC
current consumption data.
The voltage level V
(B_IT−)
+ V
hys(B_IT−)
is ≤ 1.8 V.
2. During power up, the CPU begins code execution following a period of t
d(BOR)
after V
CC
= V
(B_IT−)
+ V
hys(B_IT−)
.
The default FLL+ settings must not be changed until V
CC
≥ V
CC(min)
, where V
CC(min)
is the minimum supply voltage for the desired
operating frequency. See the MSP430x4xx Family User’s Guide (SLAU056) for more information on the brownout/SVS circuit.